Magnet-coil assembly



May 18,1926. 1,585,017 H. E. CAMPBELL MAGNET COIL ASSEMBLY Filed Feb.9,1925

INVENTOR.

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Patented May 18, lt fifi.

UNETED STAKES PATENT @FMQE.

HARRY E. CAMPBELL, OF MILXVAUKEE, WISCONSIN, ASSIGNOR TO UNION ELECTRICMANUFACTURING COMPANY, OF lfEIL'WAUKEE, WISQONSEN, A CORPOBATIGN OFWISCONSIN.

Application filed February This invention relates to improvements inmagnet coil assemblies, and more particularly to a means for connectingheavy external connecting leads to the san'ie.

In the construction of magnet coils, small fine wires are used, andthese, when connected to heavier lead wires, are easily broken, due tothe strain to which the lead wires are subjected.

It is, therefore, one of the objects of the present invention to providea magnet coil in which the lead wires are connected to the magnet coilframe, thereby minimizing the strain which will be imposed on the finewires and eliminating the use of binding posts.

A further object of the invention is to provide a magnet coil of a verynarrow breadth and in which the entire exterior of the frame is formedof insulated material, eliminating any possibility of wires beingshort-circuited even though the frame rests against metallic surfaces.

A further object of the invention is to provide a magnet coil soconstructed that the heavy lead wires may be connected directly with themagnet wires.

A further object of the invention is to provide a magnet coil which isof very simple construction, is strong and durable and inexpensive tomanufacture, and is well adapted for the purpose described.

With the above and other objects in View, the invention consists of theimproved magnet coil assembly and its parts and combinations as setforth in the claims, and all equivalents thereof.

In the accompanying drawing, in which the same reference charactersindicate the same parts in all of the views:

Fig. 1 is a front view of the improved magnet coil;

Fig. 2 is an edge View thereof; and

Fig. 3 is an enlarged sectional view taken on line 33 of Fig. 2.

Referring now more particularly to the drawings, it will appear that thenumeral 5 represents a magnet frame which is formed preferably ofbakelite or other insulating material. On one side or face of saidmagnet frame, circular fiange portions 6 are provided, integral with theframe and of insulating material, for the reception of a pair of heavyterminal wires 7 which enter the MAGNET-COIL ASSEMBLY.

9, 1923. Serial naeiaoao.

side openings, and the interior of said fran'ie contains magnet coils(not shown), the ends 8 of which extend outwardly through openings 9 andare twisted around the inner ends of the terminal wires, as at 10. Saidwires are then bent around a projecting portion 11 of the frame so thatany strain on wires 7 will be borne by portions 11 and the finer wireswill not be broken or strained. The space within said flange portions 6is then filled with sealing wax or other insulating compound to firmlyhold and cover the parts in position and prevent the terminal wires frombeing pulled away from the finer coil wires and to entirely cover saidwires with the insulation.

It will thus be seen that the improved magnet coil is so constructedthat the use of binding posts is eliminated and all live wires arecompletely covered up and insulated. It will further be apparent thatthe improved magnet coil is of a very simple flat constructionand may beinserted in a small space, and is well adapted for the purposedescribed.

/Vhat I claim as my invention is:

1. A magnet coil, comprising a frame portion having circular flangeportions projecting therefrom and communicating with the interior ofsaid frame, a magnet wire within said frame and terminating in saidflange portions, heavy outer terminal wires extending into said flangeportions and connected to the frame and having the end portions of saidmagnet wire twisted thereabout, said connections being entirely withinsaid flange portions, and means for keeping said wires in a fixedposition within said flange portions.

2. A magnet coil, comprising a frame portion having circular flangeportions pro3ecting therefrom and communicating with the interior ofsaid frame, a magnet wire within said frame and terminating in saidflange portions, heavy outer terminal wires extend ing into said flangeportions and connected to the frame and having the end portions of saidmagnet wire twisted thereabout, said connections being entirely withinsaid flange portions, and means for keeping said wires in a fixedposition within said flange portions and insulating them.

3. A magnet coil, comprising an insulated frame portion having circularfiangepor- Hons projecting therefrom and communiouting with the interiorof said frame, said flmxge portions having); side openings, o 11mgnetiwire v-sithin said frame and terminating in said 1'? wires entering saicflange portions and he:- ing' the ends of said magnet Wire difeeflytwisted thereabout, said connections being: entirely Within said flangeportions, said frame having portions "which project info Sftld flangesand about WhlCh H10 Loner ends of sand termmol \nros are bent, and an111' sulating compound disposed in said flanges nge portions, heavyouter terminal ,"surrounding and sealing said "wires within the flangeportions.

In testnnony whereof, I afiix my HARRY E. CAEIPBE .JZ,

